E-FDS1 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.922859 n_e = 1.933228	V_d = 20.88 V_e = 20.70	n_F - n_C = 0.044197 n_F' - n_C' = 0.045069	Coloring: 0.39 - 0.45 mkm.

Type: Schott
Spectral range: 0.40466 - 1.014 mkm.
C1 = 3.5044639 C2 = -0.020333833 C3 = 0.0538027 C4 = 0.0062874192 C5 = -0.00056922176 C6 = 0.000073559387

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.881854
n _s	1.890635
n _r	1.903664
n _C	1.910375
n _C'	1.912305
n _0.6328	1.914128
n _D	1.922482
n _d	1.922859
n _e	1.933228
n _F	1.954573
n _F'	1.957375
n _g	1.982813
n _h	-----
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6453
P_C,A'	0.2971
P_d,C	0.2824
P_e,C	0.5170
P_g,d	1.3565
P_g,F	0.6389
P_h,g	-----
P_i,g	-----
P_C',t	0.6889
P_e,C'	0.4733
P_F',e	0.5463
P_i,F'	-----

transmittance: 5 mm
τ_0.7	0.997
τ_0.65	0.996
τ_0.6	0.994
τ_0.55	0.99
τ_0.5	0.981
τ_0.48	0.98
τ_0.46	0.96
τ_0.44	0.93
τ_0.42	0.86
τ_0.4	0.65
τ_0.39	0.41
τ_0.38	0.09

transmittance: 10 mm
τ_0.7	0.995
τ_0.65	0.991
τ_0.6	0.988
τ_0.55	0.977
τ_0.5	0.958
τ_0.48	0.95
τ_0.46	0.92
τ_0.44	0.88
τ_0.42	0.78
τ_0.4	0.4
τ_0.39	0.13
τ_0.38	0.01

Knoop hardness: 460
Abrasion: 240

Staining: 2
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	63
100 ~ 300	72

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-2.3
-20 ~ 0		-1.7
0 ~ 20		-1.1
20 ~ 40		-0.5
60 ~ 80		0.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.3
-20 ~ 0		0.5
0 ~ 20		0.8
20 ~ 40		1.1
40 ~ 60		1.5
60 ~ 80		1.8